Finger/palm-print image processing apparatus, finger/palm-print image processing method, and recording medium in which finger/palm-print image processing program has been recorded
First Claim
1. A finger/palm-print image processing apparatus for processing a finger/palm-print image that is an image of a finger/palm-print, the finger/palm-print image processing apparatus comprising:
- an image converting unit for converting the finger/palm-print image into a converted image having sets in which elements of the finger/palm-print image are gathered and comprising a first set of elements in which the degree of change in color information in the elements within the set of elements satisfy a predetermined criterion, and a second set of elements in which the degree of change in color information in the elements within the set of elements do not satisfy a predetermined criterion; and
a region detecting unit for selecting a region that is a part of the converted image converted by the image converting unit, determining whether or not a selected region that is the region that was selected contains at least a prescribed number of the first set of elements, and detecting the selected region as a region with at least a prescribed number of the first set of elements only when at least the prescribed number are contained;
wherein the region detecting unit selects a region on the right side of the selected region as a second selected region when the selected region is on the left side of the converted image, and from there reselects regions surrounding the selected regions until a predetermined number of regions containing at least a predetermined number of the first set of elements is detected in a counterclockwise direction; and
selects a region on the left side of the selected region as a second selected region when the selected region is on the right side of the converted image, and from there reselects regions surrounding the selected regions until a predetermined number of regions containing at least a predetermined number of the first set of elements is detected in a clockwise direction.
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Abstract
A finger/palm-print image processing apparatus comprises: an image converting means that converts finger/palm-print images to conversion images consisting of first and second sets of elements; and an area detecting means that detects, from the conversion images as converted by the image converting means, an area where the number of the first set of elements is equal to or greater than a predetermined number. The first and second sets of elements herein are the elements of sets each of which consists of elements of the finger/palm-print images. The first set of elements have those degrees of change in color information which meet a predetermined criterion, while the second set of elements have those degrees of change in color information which do not meet the predetermined criterion.
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Citations
7 Claims
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1. A finger/palm-print image processing apparatus for processing a finger/palm-print image that is an image of a finger/palm-print, the finger/palm-print image processing apparatus comprising:
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an image converting unit for converting the finger/palm-print image into a converted image having sets in which elements of the finger/palm-print image are gathered and comprising a first set of elements in which the degree of change in color information in the elements within the set of elements satisfy a predetermined criterion, and a second set of elements in which the degree of change in color information in the elements within the set of elements do not satisfy a predetermined criterion; and a region detecting unit for selecting a region that is a part of the converted image converted by the image converting unit, determining whether or not a selected region that is the region that was selected contains at least a prescribed number of the first set of elements, and detecting the selected region as a region with at least a prescribed number of the first set of elements only when at least the prescribed number are contained; wherein the region detecting unit selects a region on the right side of the selected region as a second selected region when the selected region is on the left side of the converted image, and from there reselects regions surrounding the selected regions until a predetermined number of regions containing at least a predetermined number of the first set of elements is detected in a counterclockwise direction; and selects a region on the left side of the selected region as a second selected region when the selected region is on the right side of the converted image, and from there reselects regions surrounding the selected regions until a predetermined number of regions containing at least a predetermined number of the first set of elements is detected in a clockwise direction. - View Dependent Claims (2, 3, 4, 5)
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6. A finger/palm-print image processing method for processing a finger/palm-print image that is an image of a finger/palm-print, including the following steps:
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converting the finger/palm-print image into a converted image having sets in which elements of the finger/palm-print image are gathered and comprising a first set of elements in which the degree of change in color information in the elements within the set of elements satisfy a predetermined criterion, and a second set of elements in which the degree of change in color information in the elements within the set of elements do not satisfy a predetermined criterion; and selecting a region that is a part of the converted image, determining whether or not a selected region that is the region that was selected contains at least a prescribed number of the first set of elements, and detecting the selected region as a region with at least a prescribed number of the first set of elements only when at least the prescribed number are contained; a region on the right side of the selected region is selected as a second selected region when the selected region is on the left side of the converted image, and from there regions surrounding the selected regions are reselected until a predetermined number of regions containing at least a predetermined number of the first set of elements is detected in a counterclockwise direction; and a region on the left side of the selected region is selected as a second selected region when the selected region is on the right side of the converted image, and from there regions surrounding the selected regions are reselected until a predetermined number of regions containing at least a predetermined number of the first set of elements is detected in a clockwise direction.
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7. A non-transitory recording medium on which is recorded a finger/palm-print image processing program for accomplishing on a computer a finger/palm-print image processing method for processing a finger/palm-print image that is an image of a finger/palm-print, wherein the recording medium records a finger/palm-print image processing program comprising:
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an image converting step for converting the finger/palm-print image into a converted image having sets in which elements of the finger/palm-print image are gathered and comprising a first set of elements in which the degree of change in color information in the elements within the set of elements satisfy a predetermined criterion, and a second set of elements in which the degree of change in color information in the elements within the set of elements do not satisfy a predetermined criterion; and a region detecting step for selecting a region that is a part of the converted image converted by the image converting step, determining whether or not a selected region that is the region that was selected contains at least a prescribed number of the first set of elements, and detecting the selected region as a region with at least a prescribed number of the first set of elements only when at least the prescribed number are contained; wherein the region detecting step a region on the right side of the selected region is selected as a second selected region when the selected region is on the left side of the converted image, and from there regions surrounding the selected regions are reselected until a predetermined number of regions containing at least a predetermined number of the first set of elements is detected in a counterclockwise direction; and a region on the left side of the selected region is selected as a second selected region when the selected region is on the right side of the converted image, and from there regions surrounding the selected regions are reselected until a predetermined number of regions containing at least a predetermined number of the first set of elements is detected in a clockwise direction.
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Specification